Index: tol/cmake/modules/FindCLAPACK.cmake
===================================================================
--- tol/cmake/modules/FindCLAPACK.cmake	(revision 2c56a00dec5dd7253cda282b3f7d9de95de7099a)
+++ tol/cmake/modules/FindCLAPACK.cmake	(revision f5f1624182e47007bf22767ca1f92b0f045b2b07)
@@ -31,4 +31,12 @@
   set( CLAPACK_NAME clapack )
 endif( NOT CLAPACK_NAME )
+
+if( NOT CLAPACK_DIR )
+  if( UNIX )
+    set( CLAPACK_DIR /usr )
+  else( UNIX )
+    message( STATUS "Unkown CLAPACK_DIR for system ${CMAKE_SYSTEM_NAME}" )
+  endif( UNIX )
+endif( NOT CLAPACK_DIR )
 
 find_library( CLAPACK_LIBRARY NAMES ${CLAPACK_NAME}